Premarin Oral Dosing for Menopausal Symptoms

Introduction to Premarin Therapy

• The American College of Obstetricians and Gynecologists and other guideline societies recommend that women with an intact uterus must receive concurrent progestin therapy to prevent endometrial hyperplasia and cancer, with combination estrogen-progestin reducing endometrial cancer risk by approximately 90% 2, 3, 1

Progestin Co-Administration Requirements

• Women without a uterus can use estrogen-alone therapy, according to the National Comprehensive Cancer Network 2, 3

Contraindications to Premarin

• The National Comprehensive Cancer Network lists absolute contraindications to Premarin, including history of breast cancer or other hormone-dependent cancers, active or recent thromboembolic event, active liver disease, pregnancy or potential pregnancy, unexplained vaginal bleeding, and antiphospholipid syndrome 2, 3, 1

Risk-Benefit Profile

• The Women's Health Initiative data shows that per 10,000 women taking estrogen-progestin for 1 year, there are increased risks of 7 additional coronary heart disease events, 8 additional strokes, 8 additional pulmonary emboli, and 8 additional invasive breast cancers, but also decreased risks of 6 fewer colorectal cancers and 5 fewer hip fractures 4, 1

Treatment for Vulvar and Vaginal Atrophy

• The National Comprehensive Cancer Network recommends low-dose vaginal estrogen preparations over systemic therapy for isolated vaginal symptoms without vasomotor symptoms, with vaginal estrogen rings, suppositories, or creams providing 60-80% improvement in genitourinary symptoms 2, 3, 1

Bone Health Effects

• The American College of Obstetricians and Gynecologists states that hormone therapy should not be initiated solely for osteoporosis prevention, as alternative therapies with better safety profiles exist for this indication 6, 1

Critical Clinical Pitfalls to Avoid

• The American College of Obstetricians and Gynecologists advises to never initiate Premarin in women over 65 for chronic disease prevention, as this increases morbidity and mortality, and to never use estrogen alone in women with an intact uterus, as this dramatically increases endometrial cancer risk 1, 4, 2